I'm still trying to give love to those underworld dreams and liliana's caress decks. Here a card I think would be good for both and also fit in a 'helper' EDH deck. Cost is the same as howling mine, though it's slightly different.
Artificers Returns2
Artifact
At the beginning of each player's draw step that player draws an additional card. For each additional card drawn this way that player discards a card.
Artificers Returns 2
Artifact
At the beginning of each player's draw step that player draws an additional card. For each additional card drawn this way that player discards a card.
While there are differences they don't seem meaningful.